Gaya APA
Ryeol, K, S.
(2011).
Why? Origin of Humankind and Civilization
.
Jakarta:
PT Elex Media Komputindo.
Gaya MLA
Ryeol, Kim, Seung.
"Why? Origin of Humankind and Civilization".
Jakarta:
PT Elex Media Komputindo,
2011.
Buku Teks.